Finding the Fourth Proportional to 1,535.39, 2,118.86 and 836.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.39 : 2,118.86 = 836.76 : x
2. Step 2: Convert to fraction form
   1,535.39/2,118.86 = 836.76/x
3. Step 3: Cross multiply
   1,535.39x = 2,118.86 × 836.76
4. Step 4: Simplify right side
   1,535.39x = 1,772,973.11
5. Step 5: Solve for x
   x = 1,772,973.11/1,535.39
6. Step 6: Final answer
   x = 1,154.74